Junction-box connector.



N M. JANOFSKY-J JUNCTION BOX CONNECTOR.

APPLICATION FILED JULY 24.19I5,

1,246,102. I PatentedNsv. 13, 1 17.

N gvwe n-roz Wi t M26004) S 5 k y I att cs i "1 IE "NASHIIG'GTGN, DISTRICT 01* COLUMBIA, ASSIGNQR TO WINNER 1 9., i.1l'CORPOBATED, E WASHINGTGN, DISTEZCI OF COLUMBIA.

JUNCTION-BOX CGNNla-C'IGE.

Application filed July 24, 1915.

care:

2: JANorsKY, a citiand a resident of strict of Columbia, iv and useful 111') 43oz: Connectors, of I a. specification, retcompanying drawspecification.

so improvements in detachably hold a to a junction box; and

my invention is to connector of simple n; a secure fastening and Jason the cable sheath and s to provide a junction nged that one conneceycral mass in a mancaole in secure position, er, permitting the cable fCilGCl in manually maof my invention is to ,1. cted, positively opwhile firmly holding nal detachment, does objects in. ie consists in the comof parts as will ly described and at in the appended claims, stood that changes in shown and described he scope of the claims the spirit of the in drawings forming a on, and in which like indicate similar parts View of a pen th a connector enicured thereto.

evation of the com .e as detached.

i provide a consan electric cable Specification of Letters l atent.

the lock 9 Patented Nov,- 13,

Serial No. (H353.

or sheath conductor can be readily secured to a junction box. My connector includes a jam collar Working upon a tubular holding member having its forward end formed into a lurality of clamping jaws, which can be forced inward to such degree in advancing; the collar that the connector Will take any one of say three sizes of cables of standard make, this being possible owing to the fact that the cables are easily compressible and the jaws are yieldingly held.

In the further aim of my invention 1 employ a holding member including an annulus 1, having aninwardly directed stop flange While from the opposite edge extend a plurality of integral equiformed spring arms 3, these arms being tubularly arrangechas shown, each arm on the inside ancl'ne ar its outer end having a plurality of co-action 1 1th fine lips 5, so that when said an; collar 1* advanced the spring arms are forced is :1 so as to securely impinge upon the held by the holder.

As shown in Fig. 1 the holder is held Within an opening' a of a. junction box A having the fian e B provided With the s rew openings 0, as is usual in the art.

As shown the holding member is provided with a locl: nut 9, which is ada ted to thread over the annulus and the spring arms. As shown these spring arms 3 are, however, only threaded a portion of their length, the forward ends being smooth and unthreaded.

in sec V cable D the same is forced into he aortic? until the sheath encounters the stop flange 2. in this position a part of the insulation projects through the holder, the conductors F in turn projecting beyond the insnla" 'on. as shown in Fig. 1.

' Ai iolcler has been inserted Within the one... j c, the lock nut 9 is tightened which results in the holder being; drawn inward, during which operation the jam colis iorced over the cam lip 6, resulting in 1&1 a the jaws being forced inward to securely clamp the cable to the nnction hos. After has been properly adjusted, no

ordinary pulling strain upon the cable will result'in releasing the same from the holder.

It should be understood that these con ductors are made in various sizes and of any suitable material.

In the form as described the holding memher is placed upon the end of the cable, which is then inserted into the opening (1 within the junction box, and not until the holder is secured. within the junction box are the jaws forced into engagement with the cables.

A junction box connector constructed according to my invention is simple and inexpensive and both durable and efficient in operation, and can be adjusted or detached with ease, accuracy and despatch.

Having thus described my said invention what I claim as new and desire to secure by Letters Patent is:

, 1. A connector of the class described com prising the combination with a junction box having an inlet opening, of an annulus having a plurality of equiformed spring arms extending from one edge each arm upon the inside and near its outer end having a plurality of inwardly directed gripping jaws said annulus and arms being exteriorly threaded, a cam lip being formed upon the outer face and near the end of each arm, a

jam collar having a conical active surface at one end for co-action with said lips said collar adapted to loosely Work over said arms, said annulus held within said box, and a nut threading upon said arms to force said collar into engagement with said box, as and for the purpose set forth,

2. The combination with a junction box having an opening, and a cable passing through said opening to the interior thereof, of a member loosely held within said opening including an annulus having an innaaenea wardly directed stop fiange limiting the inward movement of said cable and a plurality of integral equiformed spring arms, said arms being tubularly arranged, each arm on the inside near its outer end having a plurality of inwardly directed gripping jaws, said annulus and arms being exterior-1y threaded, a cam lip being formed upon the outer face and near the end of each arm, a jam collar loosely held upon said arms and working against the outer face of said box having an inner conical active surface arranged for coaction with said lips, a lock nut adapted to thread over said annulus and the spring arms working against the inner face of said junction box, whereby said an nulus is drawn inward resulting in said cam lips engaging said jam collar insuring said spring arms being forced upon the cable and hold the same to said junction box, as, and in the manner set forth.

3. In combination, a member comprising an annulus having an inwardly directed stop flange and a plurality of integral equiform spring arms tubularly arranged, each arm on the inside near its outer end having a plurality of inwardly directed gripping jaws, said annulus and arms being exteriorly threaded, a cam lip being formed upon the outer face and near the end of each arm, a jam collar loosely held upon said arms having an inner conicalactive surface arranged for co-actionwith said lips, and a lock nut adapted to thread over said annulus and said spring arms as and for the purpose set forth.

In testimony whereof I aiiix my signature, in the presence of two witnesses.

' MAX JANOFSKY.

Witnesses:

J. EDWARD Lewis, (1 ANDREW Hunrna. 

